The Strength cape is a Cape of Accomplishment, obtainable by players with 99 Strength. The Strength cape can be bought with the hood from Sloane in the Warrior's Guild for 99,000 coins. Sloane is located on the second floor, after passing through two iron doors.

A player performing the strength cape's emote.

Like all skill capes, the Strength cape gives +9 to all defensive stats, and also a +4 bonus to prayer if it is trimmed, which requires a separate skill at level 99. The cape is automatically trimmed if this condition is met.

When the strength cape is equipped, players are able to teleport to the Warriors' Guild for an unlimited number of times. Unlike the combat bracelet, the cape will teleport players inside the guild.

Also, whilst the cape is equipped, there is a right click "boost" option that increases the players strength level to 100 temporarily.